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RTS902 Datasheet

  • RTS902

  • NATURAL SOUND EFFECT MELODY GENERATOR

  • 5頁(yè)

  • ETC

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RTS902
NATURAL SOUND EFFECT MELODY GENERATOR
Features
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Operating Voltage range: 2.4V to 5.0V
Low power consumption
256-note ROM memory
RC oscillator with an external resistor
1 sequence trigger key and 3 direct access keys are provided to select which song is to
be played.
Built-in on-the-chip envelope modulator
Direct-drive speaker and programmable LED flash
Provided PEN pin for drive motor
Typical oscillator frequency: 128 KHz
Power-ON Reset; melody begins from the first note.
General Description
RTS902 is a CMOS LSI designed for toys, doorbells and music boxes. It plays pr-
programmed melody and is capable of generating songs in piano effect by using the built-in
digital envelope circuit. By pushing the sequence trigger key, a songs can be played
ll
sequentially with an Auto-Stop function. In addition, all songs can be placed in one of the
three regions and selected by pushing their corresponding direct-access keys providing the
Auto-Stop function.
Pin Assignment
OSCI
Block Diagram
OSCO
Tone
Generator
Oscillator
Circuit
Modulator
OUT
PEN PLED
TR3
TR2
TR1
PEN
PTB
TR0
NC
NC
1
2
3
4
5
6
7
8
16
15
14
OSCO
OSCI
VDD
OUT
GND
NC
PLED
NC
Rhythm
Generator
Address
Counter
TESTO
Tempo
Generator
ROM
Ripple
Counter
RTS902
12
11
10
9
13
TR0
TR3
TESTB
.
.
.
.
.
Control
Logic
V2.0
May/12/2002
www.msquaretech.com
Page 5 of 1
The above information is the exclusive intellectual property of M-Square Technologies Corporation and shall not be disclosed, distributed without permission from M-Square.

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